Fabrication and Optimization of Polymer Solar Cells Based on P3HT:PC70BM System

Abstract EN

Efficient bulk heterojunction (BHJ) polymer solar cells (PSCs) based on P3HT:PC70BM were fabricated by optimizing the processing parameters.

The optimized thickness and annealing temperature have been found to be about 200 nm and 130°C.

The effect of cathode interfacial layers on device performance is related to the formation of interfacial dipole.

Furthermore, the effect of optimum ZnO interfacial thickness (~30 nm) on device performance is attributed to good interfacial conductivity and its optical property.

The metal electrode deposited in the slow rate has a better influence on device performance.

Based on these optimal conditions, the best power conversion efficiency (PCE) of 3.91% was obtained under AM 1.5G and 100 mW/cm2 illumination.

This detailed investigation provides an important reference for the fabrication and optimization of polymer photovoltaic devices.